Method of making nose guards



Aug. 10, 1937. J. w. WELSH 2,039,233

METHOD OF MAKING NOSE GUARDS Filed Dec. 29, 1933 2 Sheets-Sheet l I77 veflfibr James 21/. Z06 65/1 attorney Aug. 10, 1937.

2 Sheets-Sheet 2 Filed Dec. 29, 1933 Inventor mes-k). (dew/1 MN MN E ll M w ow I| I l I I I I I I I ll METHOD OF MAKIlS IG -N OSi l GUARDS JamesfWilsonWelsh, Providence, R; assignor -toThe 'Welsh Manufacturin CompanypProv- I idence,=-"R.' I.,.-a corporation of -Rhode Island gApplicationrDecember 29, 1933,S erial"No.804.393 I 3 Claims. K01. 1s 59) The-present invention-relates to methods of makingnoseguards for ophthalmic mountings, particularly .nose aguards. comprising non-metal amaterial.

15 ziInLetters Patent-sofqthe United States; No.

r. 1,955,843 granted-April 24,;1934, there isdisclosed aanew and improved-.nosetguard comprising an v-unbacked, non-metal, nose rest that has essen-- tiallythe flexibility softness and other charac- 10-teristics .of the non-metal material, .but that is txnevertheless'reinforced-by a --metal support to 12'1COII1IJ8I'1S3126 .for; the weakness of such non-metal 7,.

I jwmaterial. V

.iAn iobiect 'of;the :present invention is to; provide *=15 aenewxand -improved'method f making a guard of :the', charactendisclosed in the said Letters Patrent;

1 According to the construction disclosed 'in', the

said letters Patent, srtheizmetalsupport, extends 20; entirely; or-subs'tantially;throughthe non-metal QIIQSQiIGSt, from therrearface to. or near to, the

.; :frontdace. f Thisintroduces the actuality, or, at

least,;;the: possibility, ofthe. metal 'rcoming: into rcontactwith the-skin of;the, wearers nose, and; another objectgof the-invention li s-to provide a i novel method .of making; a guard :of. the above- :1 .0 described; character-:that ishall eliminate this de- 5 infect. i

1 In the guard-ofrthesaid Letters Patent. fur- 30 thermore, .thev metal, and the: non-metal, parts .-,.a-re secured together-in such way that they sometimes have a tendency to become separated from: c

" each:other,.vand:still a.:further objectofxthe invention;,therefore', is to provideanewxand-im- 35 proved methodof making a guard of the above- ,7

described characterithezmetal and: the non-metal c -parts of whichshall-be joined together: so securely 1 asto be almost inseparable.

. wAnotherkobjectgyis tooprovide a new and imimproved method of making: nose guards 0f the said character.

--Other. and further objects will be explained;

hereinafter and will be particularlypointed out -i in' theappended claims. i

I 15 "I'lieinventionwill now be explained in connection with the accompanying-drawings,in which -'Fig. 1 is a rearelevationof an ophthalmic mountwith'the'present inventiony- Fig; 2iis-a plan of 501the-same; Figs. .3 and 4 are enlargedsections I taken'upon the lines3'3 and 44;of ,Fig. 1, "-"lookingdn the directions: of the arrows; Fig. 5 isa-rear elevation ofrthe-lnovelguardx manufacturedin accordance with thepresentinven- 55 etion; Fig. 6. is a section taken upon the line 6-6 -.;':of"FZig; 5;'looking in'zthesadirection off the; arrows;

v1 !ig.:'7=;is a perspectiveof the novel; nose-restsup- 60 the line 8-8 of Fig. 7, looking in the direction of 'in l igsfi 6,10 and 13, duringthe assembly process of" the nose rest l0 with the m etal support '8, as hereinafter de'scribedq'A stem'29 is -,o-riginally cut out of the'metal sheetof which' tlie' arm 8 -is-constitutedby slotting at'3 l from the periphery i -33"of' the d-isk inward to about the center of the 55 P dishand bending the stem 2 9 out of the plane of the sheet'at-the convex side, as illustrated in Figs. port shown in Figs. 1 to 6, prior to its assemblyi 8 and-9: .-Concavo-tconvex prd 3518311111? 31 g .wlthithe nosemest; Fig. 8 is a section taken upon ;.:the-. arrows Fig; 9: isg a section itaken upon; the 'line 9--9 of Fig. 8, lookingtinuthedirection r701? :the arrows ';Fig; *-10- is a ssection, taken .upon :the line 8-1 llrof -F'ig; 5,',-looking insthe: direction -ofthe-arrowsr Fig: 11 is a planrillustrating a 5 stepinx the manufacturey 12:.i's azsection '='taken 1 upon r'the: liner I 2'..:l 2" ofnFig; 1'1; '-.showing rfthea. relative position of the parts .prio'rito the I descent of; the m'ovableidie; :and Fig'f'13 is'a. similar,section,showingiithe :parts. in the-relative 10 positions occ'upiedafter the: descent of the movabledie. 2-

' Each nose rest lo iscomposed of so'm'e 'non- 1 metal material, likexcelluloid, unbacked-by any reinforcing or supporting member, such as metal. 15 .Each nose rest 18 .isprovided with: an opening I extendingpin the direction ofthe thickness dicumensioii of the nose'frest',from'the'inner face of the :nose rest,= inwa'rd a substantialdistanceto- :ward. the outer face'16, asillustrated more-par- 20 fticularlyin :Figs'. 6; 10 and-13;. 5 The thickness .dis-

tance between the:oppositelydisposed faces l6 and-. I8 -isflof I course, --smallcompared with the dimensions along said faces in the' direction of the lengthor the"-'widthof the-nose rest. The

metal arm18 has' integral the'rewith a "metal mem- -:ber '20, preferably in -the form "of a circular 'disk, that is inserted in the 'o'per-iing 1 4; The oper ling l4;' into which-the metal dis k ZO -is' received, extends-over a distance, ina direction" along'j tl'itaces l 6 1 andl 8, that is-- of substantial 1 extent compared with the' dimensions of the'jguard; so

as to provide iof-thusebf a substantial'amount of metal, which is of corresponding extent. flIhe {thickness of the metaldiskilbetween the corf cave and convex-faces thereof, is small compared with its diameten'as is shown more particularly a in Figs. 4, 5 to: -10," 12- a nd 13, though this nretal thickness is very thin compared with" the thick:

ness-of the'nose rest, as isillustrated mor p y-'2 40 ticularly-in-I igs; (1', -6 10 and 13. The'parts are rigidly secured together, as hereinafter'described,

thus forming anintegral, one piec e, 'unbacked non-metal guard, ex'cep'tfor the metal portion -2 (l.

= The-metal disk-20 is, originally,-mo-re or'lesfs' concavo-convex, or "cup shaped, as illustrated fli g embodying a nose guardmade in accordance more partlculaflymlmga 9 d b comes substantially: flattened out; as illustrated arexthus tforinediat :th'e .sidesfofethe sloti3l It is the thus slotted, pronged disk 20 that is later embedded in the opening M of the unbacked nose rest.

To effect this embedding, the stem 29 is first inserted in a correspondingly shaped-and-sized opening 39 of a fixed die 4|, as illustrated in Fig. 12, with the disk 20 exposed and its concave side facing away from the die 4|. A strip 43 of the non-metal material is fed through a guide 45 and over the concave side of the disk 2|. During its passage through the guide 45, the strip 43 may be very slightly heated in any desired way, preferably electrically, electric terminals for the heater being shown at 41. During a moment of pause in the feed of the strip 43, a movable die 49 is caused to descend upon the strip, from the position illustrated in Figs12 to'the position illustrated in Fig. 13.

Owing to the above-described relative dimentions of the parts, and the concavo-convex shape of the' metal disk 20, as well as the method of the sharp portions of the disk 20 are caused to cut their way into this heated, under face of the strip 43 during the application of pressure by the descending die 49. In so doing, the metal disk 20 displaces the non-metal material in this heated under-face area of the metal disk, thus cutting its own opening |4 into the non-metalmaterial, of a size and shape exactly corresponding to the size andshape of the metal disk 20. The metal disk 20 thus becomes securely embedded in the opening l4, in, the position formerly occupied by 1 the displaced, non-metal material.

The movable die 49 is provided with a cutting face 5| that, in cooperation with a corresponding face 53 of the fixed die 4 severs from the strip 43,

simultaneously with the before-described pressing operation, a portion of the non-metal material that has the shape and size desired for the unbacked, non-metal nose rest In, as illustrated in Figs. 1 to 6, 10 and 13.

51 of the dies 49 and 4|, furthermore, are curved,

as illustrated in Figs. 12 and 13; to impart the desired, curved shape to the non-metal noseand 13. The pressing force exerted by the moving die 49 is suflicient, not only to press the heated zylonite or other non-metal material into the depression 59, but also to flatten out the concaveconvex disk duringthe curving of the non-metal nose rest I I], as before described. This flattening out of the metal further acts to embedthe metal in under the flowed-over portion 6| of the :non-l metal material- When the non-metal material becomes chilled i l a t 15 a most lmposslble' wlthout the metal support to become embedded flat-wise breaking the metal stem 29, to pull the'metal disk 2|] out of its embedded position. As the 'relatively large metal'disk 20 is forced into the celluloid sidewise, instead of along its edge periphery,

great pressure to force the disk 20 into the zylonite, and great pressure to remove it. This would be true even if the disk 20 had been un- The active faces 55 and a greater holding action is obtained. Itreq'uires' slotted at 3|, but this slot 3|, and the prongs 35, 31 adjacent thereto, contribute to the holding action of the metal in-the zylonite.

The described method has been found to eliminate all possibility of the parts becoming separated. The stem 29 is later looped into the nite member to a metal disk having a stem cut therefrom from the periphery of the disk inward, thestem being'bent out of the'disk at the convex side to provide a slot in the disk, whereby concavo-convex prongs are formed in the disk at the sides of the slot, said method comprising.

positioning the concave side of the disk adjacent to the zylonite member, heating the zylonite member, pressing the heated zylonite member and the metal disk toward each other along the area of the disk to cause the slotted disk to displace the heated zylonite of the zylonite member throughout the area of the slotted disk to cause the pronged, slotted disk to become flattened and to become embedded in the zylonite member, in flattened form, in the position formerly occupied by the displaced zylonite', and causing the displaced zylonite to flow over the opposite face of the slotted disk. 5 '1 2. A method of joining an unbacked zylonite nose rest to a substantially flat metal support comprising providing a strip of unbacked-zylonite material, positioning the substantially flat metal support flat-wise adjacent to thestrip, heating the strip, severing the nose rest fromthe heated strip and, simultaneously therewith, pressing the-heated stripand the'metal support flat-wise toward each other along the area of the said substantially fiat metal support to cause the substantially fiat metal support to become embedded fiat-wise in the zylonite nose rest in 'the position formerly occupied by the displaced zylonite.

3. A method of making a nose guard comprising a zylonite nose rest the thickness of which is small compared with its length or its width and that is supported by a substantially flat metal support the thickness of which is small compared with its length or its width and with the thickness of the zylonite nose rest and the length of which is of substantial extent compared with the length of the zylonite nose rest, the said method comprising positioning a face of the metal support adjacent to a face of a strip of zylonite of the first-named thickness, heating'the strip to soften it, severing the nose rest from the heated strip, forcing the metal support flat-wise into the heated zylonite'nose rest along the area of the metal support to cause the metal support to displace the heated zylonite of the nose rest throughout the area of the metal support and to cause heated zylonite to become chilled to harden it.

JAMES W. WELSH. 

